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Vulnerabilities

Vulnerability · CVE-2026-13322

KubeVirt downward metrics virtio-serial server vulnerable to unbounded memory consumption

Published Jun 26, 2026 · catalog updated Nov 4, 2026 · KubeVirt downward metrics virtio-serial

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-13322. EPSS is 0.13%. Act only if a listed version of KubeVirt downward metrics virtio-serial is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (KubeVirt downward metrics virtio-serial).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low3.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Advisory link
Affected products
Go github.com/kubevirt/kubevirt

A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing unbounded memory allocation in the virt-handler process until it is OOM-killed.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Go github.com/kubevirt/kubevirt1.1.0-alpha.0 → 1.10.0-rc.0

How to fix CVE-2026-13322

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-13322. EPSS is 0.13%. Act only if a listed version of KubeVirt downward metrics virtio-serial is installed.

Which versions are affected?

Compare what you have installed with 1.1.0-alpha.0 → 1.10.0-rc.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 26, 2026 · GitHub Advisory Database

    Detected

    A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing

  2. Nov 4, 2026 · GitHub Advisory Database

    Fix available

    github.com/kubevirt/kubevirt fixed in 1.10.0-rc.0

  3. Nov 4, 2026 · GitHub Advisory Database

    Updated

    A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing

Sources

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Go Vulnerability DatabaseNov 5, 2026
  • GitHub Advisory DatabaseNov 5, 2026
  • OpenSSF OSV / OSV ScannerNov 5, 2026
  • CVE.orgNov 4, 2026